Lactation is the process of producing breast milk. For women who are pregnant or recently gave birth, lactation is normal. Hormones signal the mammary glands in your body to start producing milk to feed the baby. But it's also possible for women who have never been pregnant — and even men — to lactate.

Can I lactate without pregnancy?

Lactation is common after a woman has given birth, and it can sometimes occur during pregnancy too. However, it is possible for both women and men to produce a milky discharge from one or both nipples without being pregnant or breastfeeding. This form of lactation is called galactorrhea.

What happens when you start lactating?

As you begin breastfeeding, your baby's sucking will tell your body to start making milk. For most mothers, this thinner, whiter form of milk comes in by about 3 days after birth, but may take longer for first-time moms. You may notice your breasts feeling full, hard, and warm as this happens.